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Finding the Fourth Proportional to 40,258.92, 55,609.60 and 30,640.38

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Solution

The fourth proportional to 40,258.92, 55,609.60 and 30,640.38 is: 42,323.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,258.92 : 55,609.60 = 30,640.38 : x
  2. Step 2: Convert to fraction form
    40,258.92/55,609.60 = 30,640.38/x
  3. Step 3: Cross multiply
    40,258.92x = 55,609.60 × 30,640.38
  4. Step 4: Simplify right side
    40,258.92x = 1,703,899,275.65
  5. Step 5: Solve for x
    x = 1,703,899,275.65/40,258.92
  6. Step 6: Final answer
    x = 42,323.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.